500mA USB-Compatible Lithium Ion Battery Charger
CN3052A
General Description:
The CN3052A is a complete constant-current
/constant voltage linear charger for single cell Li-ion and Li Polymer rechargeable batteries. The device contains an on-chip power MOSFET and eliminates the need for the external sense resistor and blocking diode. Furthermore, the CN3052A is specifically designed to work within USB power specifications. Its low external component count makes CN3052A ideally suited for portable applications.
Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The regulation voltage is fixed at 4.2V with 1% accuracy. The charge current can be programmed externally with a single resistor. When the input supply (wall adapter or USB supply) is removed, the CN3052A automatically enters a low power sleep mode , dropping the battery drain current to less than 3uA. Other features include undervoltage lockout, automatic recharge, chip enable function, battery
temperature sensing and a pin to indicate charge status.
The CN3052A is available in a thermally enhanced 8-pin SOP package.
Applications:
●Cellular Telephonestmdi-30
●Digital Still Cameras
●MP3 Players
一次性台布
●Bluetooth Applications
●Portable Devices
●USB Bus-Powered Chargers Features:
●Charges Single Cell Li-Ion Batteries Directly
from USB Port or AC Adaptor
●On-chip Power MOSFET
●No external Blocking Diode or Current Sense
Resistors Required
●Preset 4.2V Regulation Voltage with 1%
Accuracy
●Precharge Conditioning for Reviving Deeply
Discharged Cells and Minimizing Heat Dissipation During Initial Stage of Charge激光投影
键盘 ●Continuous Programmable Charge Current Up
to 500mA
●Constant-Current/Constant-Voltage Operation
with Thermal Regulation to Maximize Charge
Rate Without Risk of Overheating
●Automatic Low-Power Sleep Mode When Input
Supply Voltage is Removed
●Status Indication for LEDs or uP Interface
●C/10 Charge Termination
●Automatic Recharge
●Battery Temperature Sensing
●Chip Enable Input
●Available in SOP8 Package
●Pb-free Available
Pin Assignment
CE
GND
橡胶发泡
鞋底VIN
CHRG
BAT
FAULT
Typical Application Circuit
Figure 1 Typical Application Circuit Ordering Information
Block Diagram
滚珠滑轨
CE
Figure 2 Block Diagram
Pin Description
Absolute Maximum Ratings
All Terminal Voltage……………－0.3V t o 6.5V Maximum J unction Temperature…...150℃
BAT Short-Circuit Duration……Continuous Operating Temperature…...－40℃to 85℃
ESD Rating(HBM)……………...2KV Storage Temperature….....－65℃to 150℃Thermal Resistance (SOP8)…….TBD Lead Temperature(Soldering)…….....300℃Stresses beyond those listed under ‘Absolute Maximum Ratings’ may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to Absolute Maximum Rating Conditions for extended periods may affect device reliability.现金管理
终端 Electrical Characteristics
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